船体型线三向光顺方法及程序设计  

Fairing Method in Three Directions about Hull Molded Lines and Its Program Developing

作　　者：郑坤[1] 时光志[1] 周毅 牛志刚[1] ZHENG Kun;SHI Guang-zhi;ZHOU Yi;NIU Zhi-gang(CNOOC Energy Technology & Services Oil Production Services Company, Tianjin 300452, China)

机构地区：[1]中海油能源发展股份有限公司采油服务分公司,天津300452

出　　处：《船海工程》2021年第3期68-72,76,共6页Ship & Ocean Engineering

摘　　要：针对于船体型线光顺时,三视图修改繁琐且难以保证数据统一的问题,采用以非均匀有理B-样条(NURBS)表达船体型线的方法,特别是NURBS的拼接算法。通过ObjectARX在AutoCAD平台上实现船体型线三向光顺的程序设计,提出一种可以同时控制曲线型值点、一阶导数和二阶导数值的型线整体光顺方法。When hull molded lines is faired,the modification of hull molded lines on three orthogonal planes is tedious and it is difficult to ensure the data unification.The method of expressing the hull molded lines with non-uniform rational B-spline(NURBS),especially the splicing algorithm of NURBS,was adopted to realize the program design of the molded lines in three directions on the AutoCAD platform by ObjectARX.An approach to fairing interactive of hull molded lines on three orthogonal planes simultaneously was presented as well as its program developing.A new global fairing method for hull molded lines was developed,which can properly specify the coordinates,the derivative,and the curvature of the curves.

关 键 词：船体型线 三向光顺 NURBS AUTOCAD OBJECTARX 

分 类 号：U662[交通运输工程—船舶及航道工程]